Fix Flatpak desktop entry (zed-industries#13019)

Fixes a problem where the env variable was being set in the wrong spot
in zed-industries#12951

Release Notes:

- N/A

crates/zed/resources/flatpak/manifest-template.json

@@ -31,6 +31,7 @@
           "APP_NAME": "$APP_NAME",
           "BRANDING_LIGHT": "$BRANDING_LIGHT",
           "BRANDING_DARK": "$BRANDING_DARK",
+          "APP_CLI": "zed",
           "APP_ARGS": "--foreground",
           "DO_STARTUP_NOTIFY": "false"
         }

script/flatpak/bundle-flatpak

@@ -11,7 +11,6 @@ channel=$(<crates/zed/RELEASE_CHANNEL)
 
 export CHANNEL="$channel"
 export ARCHIVE="$archive"
-export APP_CLI="zed"
 if [[ "$channel" == "dev" ]]; then
     export APP_ID="dev.zed.Zed-Dev"
     export APP_NAME="Zed Devel"